Preview Ruby 4.1 is a preview. It can change before the final release. Switch to Ruby 4.0 →
instance method
Kernel#tap
() { (self) -> void } -> self
obj.tap {|x| block } → obj
kernel.rb
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# File tmp/rubies/ruby-4.1.0-preview1/kernel.rb, line 79
def tap
Primitive.attr! :inline_block
yield(self)
self
end
Yields self to the block and then returns self. The primary purpose of this method is to “tap into” a method chain, in order to perform operations on intermediate results within the chain.
Example
(1..10) .tap {|x| puts "original: #{x}" } .to_a .tap {|x| puts "array: #{x}" } .select {|x| x.even? } .tap {|x| puts "evens: #{x}" } .map {|x| x*x } .tap {|x| puts "squares: #{x}" }